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Finding the Fourth Proportional to 660,788.42, 991,306.67 and 211,388.63

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Solution

The fourth proportional to 660,788.42, 991,306.67 and 211,388.63 is: 317,122.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,788.42 : 991,306.67 = 211,388.63 : x
  2. Step 2: Convert to fraction form
    660,788.42/991,306.67 = 211,388.63/x
  3. Step 3: Cross multiply
    660,788.42x = 991,306.67 × 211,388.63
  4. Step 4: Simplify right side
    660,788.42x = 209,550,952,867.69
  5. Step 5: Solve for x
    x = 209,550,952,867.69/660,788.42
  6. Step 6: Final answer
    x = 317,122.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.